736001521 has 4 divisors (see below), whose sum is σ = 755893492. Its totient is φ = 716109552.

The previous prime is 736001479. The next prime is 736001531. The reversal of 736001521 is 125100637.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125100637 = 17 ⋅7358861.

It can be written as a sum of positive squares in 2 ways, for example, as 515063025 + 220938496 = 22695^2 + 14864^2 .

It is a cyclic number.

It is not a de Polignac number, because 736001521 - 2²³ = 727612913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (736001531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9945930 + ... + 9946003.

It is an arithmetic number, because the mean of its divisors is an integer number (188973373).

Almost surely, 2^736001521 is an apocalyptic number.

It is an amenable number.

736001521 is a deficient number, since it is larger than the sum of its proper divisors (19891971).

736001521 is a wasteful number, since it uses less digits than its factorization.

736001521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19891970.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 736001521 is about 27129.3479648885. The cubic root of 736001521 is about 902.8721090452.

The spelling of 736001521 in words is "seven hundred thirty-six million, one thousand, five hundred twenty-one".